SIMBAD references

Radio astronomical data of C₆H^– observed with the Nobeyama 45 m and IRAM 30 m telescopes have been analyzed by the local thermodynamic equilibrium approximation to give the column density of (6.1-8.0)x10¹²/cm2 and the excitation temperature of 32±3 K, with an assumed source size of 30"±3". The abundance of C₆H^– was estimated to be 8.6% of C₆H. The observed line shapes of C₆H^ -^ and C₆ H indicate that the distribution of C₆H^– is more present in the inner region than C₆H. The production mechanism of C₆H^– is discussed.